We created a Mailchimp tag for the Google Tag Manager server container to simplify Mailchimp integration. This tag allows GTM containers to send events to your mailing list, create or update contacts. The main benefit of this tag is that it's simpler than previous iterations because all the work is done through the Google Tag Manager server container. No coding needed.
    1. Connect your website to Mailchimp using Google Tag Manager server container
    2. How to set up Google Tag Manager Server Container